APCA-370

Ambient Carbon Dioxide Monitor

The APCA-370 is a device for continuous CO₂ monitoring in ambient air. It uses cross modulation type non-dispersive infrared (NDIR) absorption method. This method employes one cell and one light source for both sample gas and reference gas what allows precise measurement without generation of zero-drift. Due to precise measurement and long term stability in continuous monitoring as well as its minimal maintenance requirements, this method has been a preferred method for monitoring the atmospheric pollution.

Segment: Process And Environmental

Division: Ambient

Manufacturing Company: HORIBA, Ltd.

Base product: AP-370 Series

High precision and accuracy in long term
Exceptionally low drift by a combination of cross flow modulation and infrared-absorption technology
No need for adjustment by optical alignment
HORIBA's unique internal reference gas purifier*, which generates CO₂-free zero gas and enhances analyzer performance
_{* U.S. Patent No. 9962647}

Model	Ambient CO₂ Monitor
Measurement target	Carbon dioxide (CO₂) in ambient air
Measuring principle	Cross modulation type non-dispersive infrared absorption method
Range	0 ppm to 500/1000 ppm
Minimum detection sensitivity	0.5 ppm (2σ)
Reproducibility (repeating accuracy)	±1.0% of the full scale
Linearity (readout error)	±2.0%
Zero drift*	±0.1 ppm/day ±2.0 ppm/week
Span drift*	±2.0% of the full scale/day ±3.0% of the full scale/week
Response rate	60 sec or shorter (T₉₀ from the inlet)
Sample collection rate	Approximately 0.7 L/min
Display	Measured value, alarm, time, alarm history, calibration history, etc.
Alarms	Zero calibration, span calibration, etc.

_{*Ambient temperature change: within 5°C}

HORIBA offers customer oriented tailor-made system solutions with its state-of-the-art analytical technologies and more than 50 years experience in ambient air market. As your true partner in environmental preservation, we deliver air quality monitoring, indoor air quality monitoring , clean room airborne molecular contamination monitoring , quality control and stationary emission monitoring by diluted stack gas monitoring.